Document Detail

Site of ruptured intracranial saccular aneurysms in patients in Izumo City, Japan.
MedLine Citation:
PMID:  20484905     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: A community-based study was conducted to estimate the site distribution of ruptured intracranial aneurysms and to evaluate clinical features related to aneurysm site. METHODS: The author reviewed data from 358 patients with aneurysmal subarachnoid hemorrhage (SAH) treated between 1980 and 1998 in Izumo, Japan. In 291 of these patients, the sites of the ruptured aneurysms were confirmed. RESULTS: The aneurysm arose from the anterior communicating artery (AcoA) in 101 patients, the distal anterior cerebral artery (ACA) in 24, the internal carotid artery (ICA) in 70, the middle cerebral artery (MCA) in 77, and the vertebrobasilar artery (VBA) in 19. Regardless of age, ACoA aneurysms were more frequent in men, whereas ICA aneurysms were more common in women. Intracerebral hemorrhage was more frequent in patients with MCA aneurysms, whereas intraventricular hemorrhage was more common in those with VBA, ACoA and distal ACA aneurysms. While the incidence of symptomatic vasospasm was not related to aneurysm site, the patients who died due to vasospasm harbored an ACoA or ICA aneurysm. The incidence of hydrocephalus was relatively high in patients with ACoA, ICA and VBA aneurysms, and low in those with MCA aneurysms. The overall outcome was best in patients with MCA aneurysms, followed by those with aneurysms of the ACA, including ACoA and distal ACA, ICA and VBA; these results were in good agreement with the admission grades. CONCLUSIONS: The roughly estimated proportions of the sites of aneurysm rupture were 40% for the ACA, including ACoA and distal ACA, 25% for the ICA, 25% for the MCA, and 10% for the VBA. The clinical features showed significant differences according to aneurysm site.
Tetsuji Inagawa
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Publication Detail:
Type:  Journal Article     Date:  2010-05-19
Journal Detail:
Title:  Cerebrovascular diseases (Basel, Switzerland)     Volume:  30     ISSN:  1421-9786     ISO Abbreviation:  Cerebrovasc. Dis.     Publication Date:  2010  
Date Detail:
Created Date:  2010-06-09     Completed Date:  2010-09-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9100851     Medline TA:  Cerebrovasc Dis     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  72-84     Citation Subset:  IM    
Copyright Information:
Copyright 2010 S. Karger AG, Basel.
Department of Neurosurgery, Shimane Prefectural Central Hospital, Izumo, Japan.
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MeSH Terms
Aneurysm, Ruptured / epidemiology*,  etiology,  mortality,  radiography
Anterior Cerebral Artery / radiography
Basilar Artery / radiography
Carotid Artery, Internal / radiography
Cerebral Angiography / methods
Chi-Square Distribution
Hydrocephalus / epidemiology
Intracranial Aneurysm / complications,  epidemiology*,  mortality,  radiography
Japan / epidemiology
Kaplan-Meiers Estimate
Middle Aged
Middle Cerebral Artery / radiography
Proportional Hazards Models
Risk Assessment
Risk Factors
Subarachnoid Hemorrhage / epidemiology*,  etiology,  mortality,  radiography
Tomography, X-Ray Computed
Vasospasm, Intracranial / epidemiology
Vertebral Artery / radiography

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